Lathe and drilling chuck.



, W. KLEBER.

LATHE AND DRILLING CHUCK.

APPLICATION FILED FEB. 4,1909.

Patented Nov. 2, 1909.

2 SHEETS-SHEET l.

Wr KLEBERKX LATHE AND DRILLING GUGJQ Patented Nov. 2, 1909. lZSHBBTs-'SHEBT 2.

vUNITED sTATEs PATENT oEEIoE.

WALTER KLEBER, "0F HALLE-ON-THE-SAALE, GERMANY, ASSIGNOR OF ONE-I-IAL`TO BERTHOLD PSCHKE, 0F TREPTOW, NEAR BERLIN, GERMANY.

LATHE AND DRILLING CHUCK.

Specification of Letters Patent.

Patented NOV. 2, 1909.

Application led February 4, 1909. Serial No. 476,070.

dent of Halle-on-the-Saale, Germany, have invented certain new anduseful Improvements in Lathe and Drilling Chucks, of which the followingis'a specification.

The invention relates to a lathe and drilling chuck in which thedisplacement 0of the gripping dogs formed with teeth is effected by acommon controlling device so as to insure the self-centering of thegripping dogs.

The feature of the invention resides in the particular formation of thegripping dogs in such a manner as lto cause them always to completelyclose the slideways toward the working side. This prevents the enteringof metal chips into the operating mechanism and so obviates clogging andpremature wearing out of the parts.

The accompanying drawings-show the improved chuck, and Figure l is aface view thereof. F ig. 2 is a section taken on the line I l of Fig. 1.Fig. 3 is a section taken on the line II-II of Fig. 2. Fig. 4 is a sideview of one of the gripping dogs. Fig. 5 is a plan vicw of the grippingdog and its operating pinion. Fig. 6 1s a side elevation of the lsaidpinion.

The chuck casing l is fitted with the usual cover 2. Upon the hollowboss 3 is mounted a toothed wheel 4 for use in imparting simultaneousmotion to other parts, said tooth wheel being rigidly connected with awormwheel 5 driven by the usual worm 6. The toothed wheel 4 engages withthe pinions 7 which latter engage in the teeth 9 of the gripping dogs10. The shaft 8 of each pinion is mounted crosswise in the chuck l andits cover 2 and this is only made possible by' reason of the side teeth9 of the gripping dogs 10. It lis important to have plain feathers orkeys 11 at the ends of the gripping dogs 10 in such away as to exactlyfit the guide grooves 13 and thus close the latter' constantly in aperfect manner. Hereby the entering of metal chips into the operatingmechanism is entirely prevented. By providing teeth 9 at each side ofthe gripping dogs with the keys 11 at each side and at each end thereof,it is made possible to reverse the gripping dogs and thereby enable themto serve for external and for internal grlpping. This makes a second setof dogs unnecessary. In order to permit of the introduction of the dogswithout having to take the whole chuck to pieces, it is necessary tomake the driving pinions 7 of the dogs with a cut away surface 14, seeFigs.- 3, 5 and 6.'

The improved lathe nfl ling chuck -has in addition-to the advantagesdescribed,

the further advantage of having its principal working parts verystrongly mounted notwithstanding their comparatively reduceddimensionsand weights. The gripping dogs can be very firmly tightened on to theWork, and their unintentional loosening is altogether impossible.

What I claim as my invention and desireto secure by 'Letters Patent isl. In a lathe and drilling chuck in combination reversible grippingdogs, guide grooves for the latter, teeth provided at both lengthsidesof the said dogs, a pinion for each of the said dogs and engaging withthe said teeth, keys at the ends of the said dogs and adapted to snuglyfit the said gui e grooves and to close the latter, and meansv forsimultaneously turning the said pinions, substantially as and for thepurpose set forth.

2. In a lathe and drilling chuck in combination reversible grippingdogs, guide grooves for the latter, teeth provided at bot-h lengthsidesof the said dogs,a pinion for 3. In a lathe and drilling chuck in com-`bination reversible gripping dogs, guide grooves for the latter, a rowof teeth at each lengthside of the said dogs, keys at each side and ateach end of the said dogs and adapted to snugly lit the said guidegrooves `and to close the latter, a pinion for each of the said dogs andengaging with one of the saidv rows of teeth, a cut away surface formedon each of thesaid inions and ar'an'ged to disenl signed :ny naine thisSth day of Janiaiy gage the sai pinons from the said dogs, a 1909, inthe pesence of two subscibing' 1o toothed wheel engaging with itil saidpinwitnesses. ions, a. Worm Whee connected to the said 5 toothed wheel,and a Worm for tux-nin the said worm Wheel, substantially as ang forWitnesses:4 the purpose set forth. RUDOLPH Fmom's', v

In testimony whereof I have hereunto GEORG O'rfro.A

WALTER KLEBER.' 4

